Koike, Soichi Matsumoto, Masatoshi Kawaguchi, Hideaki Ide, Hiroo Atarashi, Hidenao Kotani, Kazuhiko Yasunaga, Hideo Additional file 1: of Board certification and urban–rural migration of physicians in Japan Odds of migrating to more urban areas for newly certified physicians working in first tertile areas in 2012 (sub-analysis of the individual specialties). (PDF 50 kb) Board certification;Maintenance of board certification;Urban–rural migration;Physician distribution 2018-08-07
    https://springernature.figshare.com/articles/journal_contribution/Additional_file_1_of_Board_certification_and_urban_rural_migration_of_physicians_in_Japan/6944672
10.6084/m9.figshare.6944672.v1